#pragma once

#include "common.hpp"
#include <type_traits>
/*
Note this header is an extremely easy way to cause ODR issues.

class Flags { F1 = 1 << 0,F2 = 1<< 1};
// **note I did not define any operators**

enchantum::contains(Flags::F1); // considered a classical `Enum` concept 

using namespace enchantum::bitwise_operators;

enchantum::contains(Flags::F1); // considered `BitFlagEnum` concept woops! ODR! 

*/

namespace enchantum::bitwise_operators {
template<Enum E>
[[nodiscard]] constexpr E operator~(E e) noexcept
{
  return static_cast<E>(~static_cast<std::underlying_type_t<E>>(e));
}

template<Enum E>
[[nodiscard]] constexpr E operator|(E a, E b) noexcept
{
  using T = std::underlying_type_t<E>;
  return static_cast<E>(static_cast<T>(a) | static_cast<T>(b));
}

template<Enum E>
[[nodiscard]] constexpr E operator&(E a, E b) noexcept
{
  using T = std::underlying_type_t<E>;
  return static_cast<E>(static_cast<T>(a) & static_cast<T>(b));
}

template<Enum E>
[[nodiscard]] constexpr E operator^(E a, E b) noexcept
{
  using T = std::underlying_type_t<E>;
  return static_cast<E>(static_cast<T>(a) ^ static_cast<T>(b));
}

template<Enum E>
constexpr E& operator|=(E& a, E b) noexcept
{
  using T  = std::underlying_type_t<E>;
  return a = static_cast<E>(static_cast<T>(a) | static_cast<T>(b));
}

template<Enum E>
constexpr E& operator&=(E& a, E b) noexcept
{
  using T  = std::underlying_type_t<E>;
  return a = static_cast<E>(static_cast<T>(a) & static_cast<T>(b));
}

template<Enum E>
constexpr E& operator^=(E& a, E b) noexcept
{
  using T  = std::underlying_type_t<E>;
  return a = static_cast<E>(static_cast<T>(a) ^ static_cast<T>(b));
}

} // namespace enchantum::bitwise_operators

#define ENCHANTUM_DEFINE_BITWISE_FOR(Enum)                                                \
  [[nodiscard]] constexpr Enum operator&(Enum a, Enum b) noexcept                         \
  {                                                                                       \
    using T = std::underlying_type_t<Enum>;                                               \
    return static_cast<Enum>(static_cast<T>(a) & static_cast<T>(b));                      \
  }                                                                                       \
  [[nodiscard]] constexpr Enum operator|(Enum a, Enum b) noexcept                         \
  {                                                                                       \
    using T = std::underlying_type_t<Enum>;                                               \
    return static_cast<Enum>(static_cast<T>(a) | static_cast<T>(b));                      \
  }                                                                                       \
  [[nodiscard]] constexpr Enum operator^(Enum a, Enum b) noexcept                         \
  {                                                                                       \
    using T = std::underlying_type_t<Enum>;                                               \
    return static_cast<Enum>(static_cast<T>(a) ^ static_cast<T>(b));                      \
  }                                                                                       \
  constexpr Enum&              operator&=(Enum& a, Enum b) noexcept { return a = a & b; } \
  constexpr Enum&              operator|=(Enum& a, Enum b) noexcept { return a = a | b; } \
  constexpr Enum&              operator^=(Enum& a, Enum b) noexcept { return a = a ^ b; } \
  [[nodiscard]] constexpr Enum operator~(Enum a) noexcept                                 \
  {                                                                                       \
    return static_cast<Enum>(~static_cast<std::underlying_type_t<Enum>>(a));              \
  }